倒车雷达系统是汽车泊车或者倒车时的安全辅助装置,能以声音或者更为直观的显示告知驾驶员周围障碍物的情况,帮助驾驶员扫除了视野死角和视线模糊的缺陷,提高驾驶的安全性。本设计利用AT89S51作为中心控制器,根据超声波测距原理设计。整个系统由超声波发射器电路、超声波接收电路、环境温度采集电路、显示电路及报警电路组成。当倒车时,单片机控制电路,发射超声波,遇到障碍物,超声波返回到接收电路,单片机处理超声波传输的时间,得到车与障碍物的距离S。当S〈2M时候,通过译码,送至显示电路,显示距离,并驱动报警电路。 The reversing radar system is a safety assisting device for car parking or reversing. It can inform the driver about the obstacle situation with sound or more intuitive display, and helps the driver to eliminate blind spots and blurred vision defects and improve driving safety. Sex. The design uses the AT89S51 as a central controller, based on the principle of ultrasonic ranging design. The whole system consists of ultrasonic transmitter circuit, ultrasonic receiver circuit, ambient temperature acquisition circuit, display circuit and alarm circuit. When reversing, SCM control circuit, the launch of ultrasound, encountered obstacles, ultrasonic return to the receiving circuit, the microcontroller processing ultrasonic transmission time, get the distance between the car and the obstacle S. When S <2M, through the decoding, sent to the display circuit, display distance, and drive the alarm circuit.